We've used The Six O'Clock Scramble (www.thescramble.com) for at least 4 years and still love it.
I even lost 45 pounds while doing Weight Watchers on it.

I like www.thefresh20.com.

I don't know about one that picks things for you, but two websites I've been checking out lately:

http://www.foodonthetable.com This site suggests items based on what's on sale at your supermarket this week, then puts the ingredients for 3 main dishes into an editable shopping list that you can access from your iphone. Some of the recipes sound horrible, but I made a good pork chop dish based on their suggestions last week.

and

http://shrinkingkitchen.com/menu-plan-your-butt-off-more-menus/

You can sign up to get emailed their weekly menu plans, which come with a grocery list.

Does anyone subscribe to a weekly meal planning services (where they send you the recipe and a grocery list)? I'm looking for one that offers healthy options. I used a groupon for "Mealsfortheweek.com" and it is delicious, but the meals aren't very healthy. Thanks!